* Transmission Type: The 1991 Camaro likely has a 700R4 transmission, which is a 3-speed automatic. The 1999 Tahoe uses a 4L60E transmission, which is a 4-speed automatic. While they share some similarities, they are not directly interchangeable.
* Computer Compatibility: The 1999 Tahoe's computer (ECM) is designed specifically for the 4L60E transmission and its electronic controls. It will not be able to communicate with or control a 700R4, which is mechanically controlled.
* Physical Differences: There are physical differences between the two transmissions in terms of mounting points, bellhousing, and output shaft. The 700R4 may not physically fit in the Tahoe's transmission tunnel.
What you can do:
* Upgrade to a 4L60E: You can find a used 4L60E transmission from a compatible year Tahoe or other GM vehicles. You'll need to ensure it's compatible with the Tahoe's year and engine.
* Rebuild: You could consider rebuilding the existing 4L60E in the Tahoe, which is a more involved process.
Before attempting any transmission swap:
* Research thoroughly: Consult with a reputable transmission shop or expert to confirm compatibility and ensure you have the correct parts.
* Consult Service Manuals: Reference service manuals for both the 1991 Camaro and the 1999 Tahoe to get detailed information on their respective transmissions.
Remember, swapping transmissions can be a complex task, so consider the time and effort involved before proceeding.
